4555 Overlook Avenue Southwest, Washington
technical data · neighborhood and transit
Quick answers
- Does 4555 Overlook Avenue Southwest have open permits or code violations?
- DC Department of Buildings lists 17 permits, 17 not closed, and 0 violations.
- What is the 2026 conforming loan limit in District of Columbia?
- $1,249,125 for a single-unit home, per FHFA. Larger loans are jumbo loans.
- Is radon a problem here?
- EPA radon zone 2, moderate potential.
- What natural disasters is 4555 Overlook Avenue Southwest at risk for?
- FEMA's National Risk Index rates the area very high overall, with elevated earthquake and hurricane risk.
Permits and code violations
17 permits not closed out. Unfinished permits pass to the next owner.
- Construction Oct 2026Permit issued
**federal installation of electrical duct bank, and concrete equipment pad to support a new emergency generator and associated equipment
- Construction May 2026Permit issued
***united states of america replacement of approximately 18,000 lf of deteriorated underground steam piping with new underground steam piping in the same location.
- Construction Oct 2025Permit issued
The purpose of this project is to construct new concrete equipment pads to facilitate a new transformer and associated equipment. also a new duct bank will be constructed to connect the new electrical equipment to the existing system.
- Construction Oct 2025Permit issued
**federal doee s21703 nrl e-line t-101 replacement construct new concrete equipment pad and duct bank for new transformer. remove existing concrete pad, and restore to turf.
- Construction Jun 2025Permit issued
***federal we have a project at the naval research laboratory (nrl) located at 4555 overlook ave sw, washington, dc 20375, where we are planning to remove an underground storage tank (ust). the navy requires the presence of the department of energy and environment (doee) for the removal, and doee has informed us that a permit from the department of buildings (dob) is necessary to proceed.
- Construction Aug 2024Permit issued
**federal us naval research laboratory the purpose of this project is the replace an existing transformer and removed the existing transformer pad. doee s20092
- Construction May 2024Expired
Pole foundation for a mass notification system. **federal property**
- Construction Apr 2024Expired
*****federal project***** project is to remove and replace 7 fire hydrants and 11 isolation valves within the nrl (federal government) campus water system.
- Construction Feb 2024Permit issued
- Construction Jul 2023Permit issued
- Construction Mar 2023Expired
The purpose of this project is to restore an existing stormwater management pond back to it's original design elevation. due to lack of maintenance a large about of silt and vegetation has accumulated in the ponds. this project will remove the vegetation and silt that has built up over the years.
- Construction Jan 2023Permit issued
DC Department of Buildings
Safety and environment
FEMA natural hazard risk
Very High
Highest for this area: earthquake, hurricane, tornado, coastal flooding, inland flooding, strong wind, hail, heat wave. These drive insurance cost here.
FEMA National Risk Index, census tract
Leaking fuel tanks
4 within 1,650 ft
Nearest: Department Of Public Works, 5000 Overlook Av Sw (750 ft), open. 1 still open. Ask whether groundwater or soil vapor testing was done.
EPA UST Finder, leaking underground storage tank releases
Brownfield site
2,500 ft
Proposed Asphalt Plant and 1 more within half a mile. Former industrial land in EPA's cleanup and reuse program.
EPA ACRES Brownfields
Toxic release facility
3,500 ft
Monumental Concrete. Reports chemical releases to air, water or land to EPA each year.
EPA Toxics Release Inventory
Radon potential
Moderate
Average indoor levels of 2 to 4 pCi/L. EPA still suggests testing ground-floor and basement units.
EPA and USGS Geologic Radon Potential Map
Wildfire risk
Very Low
Wildfire risk is low enough that standard home insurance usually covers it.
FEMA National Risk Index
Nearest public schools
2,500 ft
Leckie Education Campus (2,500 ft), Patterson ES (3,250 ft), Ingenuity Prep PCS (4,300 ft). Confirm the assigned school with the district.
U.S. Department of Education, NCES
Major airport
2.3 mi
Reagan National (DCA). Homes this close can sit inside the 65 dB DNL noise contour. Visit at peak hours and check the airport's noise map.
FAA large-hub airports
Conforming loan limit 2026
$1,249,125
District of Columbia. Mortgages up to this amount qualify for Fannie Mae and Freddie Mac pricing. Above it, the loan is a jumbo with stricter terms.
FHFA Conforming Loan Limit Values, one-unit
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More on Overlook Avenue Southwest
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What's worth checking in person before deciding.
- Test water pressure and temperature at the tap, in the bathroom and kitchen, for at least a minute.
- Ask specifically where you'd park: is there paid city parking, who currently holds it, what the permit costs, and how long the waitlist is.
- Look at the stairwell (cleanliness, smell) and the association's notice board: unpaid dues, conflicts, recent decisions.
- Knock on a neighboring door and ask two things: what bothers them most often, and what work is planned for the building.
- Schedule a viewing on a weekday too, between 6:00 and 7:30 PM, the window when the building is busiest: neighbors, parking, elevator.
- Ask for the latest maintenance bill from a winter month, not a summer one: that's where the real cost of living there shows up.
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